"Centurión y Asesino" by Ian Corey is a historical thriller featuring Cayo Messara, a battle-hardened centurion from Tarraco who investigates conspiracies in ancient Rome [1, 2, 3]. The story blends military action with a "whodunnit" mystery, following Messara as he navigates the dark, treacherous underbelly of Roman society [1, 2, 3].